Add script for installing hooks

This script automates the process of adding all the hooks to git config.
It should be run from the parent repo that has the git-hooks repository
as a submodule.

Bug: b/187094215
Change-Id: I2da6a931eae6aad1fa8eb5fb6aecf6ce6e825cca

install_hooks.sh

diff --git a/install_hooks.sh b/install_hooks.sh
new file mode 100755
index 0000000..90c3480
--- /dev/null
+++ b/install_hooks.sh
@@ -0,0 +1,15 @@
+#! /usr/bin/env sh
+
+#git config --add hook.pre-commit.command `realpath 
+dir=`realpath $(dirname "$BASH_SOURCE:-0")`
+
+# Space separated list of hooks to install
+declare -a HOOKS=("pre-commit" "commit-msg")
+
+for hook in ${HOOKS[@]}; do
+    if [ ! -f "${dir}/${hook}" ]; then
+        continue
+    fi
+    git config --add hook.${hook}.command "${dir}/${hook}"
+    git list hook "${hook}"
+done